Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Testing JavaScript
Search
Irfan Maulana
May 24, 2022
Programming
0
150
Testing JavaScript
Intro to JavaScript testing
Irfan Maulana
May 24, 2022
Tweet
Share
More Decks by Irfan Maulana
See All by Irfan Maulana
Panduan untuk mempublikasikan kode ke publik
mazipan
0
120
Mengukur dan meningkatkan performa website
mazipan
1
210
Membuat Website Zaman Sekarang
mazipan
0
500
Kinerja Web 101 - Edisi 2022
mazipan
1
450
Layout Repaint & The Lessons Learned
mazipan
0
410
Bagaimana implementasi mockup design
mazipan
0
490
Memulai karir sebagai web programmer
mazipan
0
740
Membuat laporan kecepatan web untuk blog
mazipan
0
530
Bongkar Dapur Webnya #PHPID-OL
mazipan
0
520
Other Decks in Programming
See All in Programming
WebAssemblyインタプリタを書く ~Component Modelを添えて~
ruccho
1
910
CSC305 Summer Lecture 05
javiergs
PRO
0
110
AWS Serverless Application Model入門_20250708
smatsuzaki
0
130
Claude Codeで挑むOSSコントリビュート
eycjur
0
180
[FEConf 2025] 모노레포 절망편, 14개 레포로 부활하기까지 걸린 1년
mmmaxkim
0
1k
KessokuでDIでもgoroutineを活用する / Go Connect #6
mazrean
0
120
Laravel Boost 超入門
fire_arlo
1
130
ソフトウェアテスト徹底指南書の紹介
goyoki
1
110
AI時代のドメイン駆動設計-DDD実践におけるAI活用のあり方 / ddd-in-ai-era
minodriven
23
9k
MLH State of the League: 2026 Season
theycallmeswift
0
160
Constant integer division faster than compiler-generated code
herumi
2
700
Understanding Ruby Grammar Through Conflicts
yui_knk
1
130
Featured
See All Featured
Fantastic passwords and where to find them - at NoRuKo
philnash
51
3.4k
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
183
54k
Scaling GitHub
holman
462
140k
A Modern Web Designer's Workflow
chriscoyier
695
190k
Unsuck your backbone
ammeep
671
58k
Making the Leap to Tech Lead
cromwellryan
134
9.5k
Keith and Marios Guide to Fast Websites
keithpitt
411
22k
Rails Girls Zürich Keynote
gr2m
95
14k
Making Projects Easy
brettharned
117
6.3k
What's in a price? How to price your products and services
michaelherold
246
12k
Product Roadmaps are Hard
iamctodd
PRO
54
11k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
820
Transcript
Testing JavaScript By Irfan Maulana
Hi, I am Irfan Working at Tokopedia as Principal Engineer
for Web Platform Team. mazipan.space @Maz_Ipan
A process to verifying the correctness & validating the functional
features of the app being developed APPLICATION TESTING
Software Development Life Cycle
JAVASCRIPT APPLICATION Frontend Backend Handling UI functionality: web, apps, desktop
Handling business logic, data store connection A B We will focus on the Frontend for this session.
PERFORM APP TESTING MANUAL AUTOMATED
WHY DO WE NEED? Bugs are bad, and who gets
blamed? The developer. You know humans are bad at complex, repetitive tasks. Computers are very, very good at complex, repetitive tasks. A professional ships working code. Code that works. Code that is well tested.
Focused on input & output. Not interested about the things
happening inside. Involve testing of the internal structure, code, design & implementation. METHODOLOGIES BLACKBOX WHITEBOX
TESTING PROCESS 1. PLANNING 2. PREPARATION 3. EXECUTION 4. REPORTING
THE TESTING TYPES
PROVEN METHOD FOR TESTING APP
STATIC TEST To catch typos, errors, possible bugs as you
write the code. Tools: • ESLint + Prettier • CodeQL, Snyk, SonarQube
Very fast feedback Can not reproduce functional bugs faced by
users STATIC TEST: PRO & CONS We can mark it as mandatory Very beneficial in the development phase
UNIT TEST To verify that individual, isolated and smallest part
works as expected. Tools: • TestingLibrary.com
Fast feedback Need an extra effort to write UT UNIT
TEST: PRO & CONS Verify the correctness of the function Can not represent the bug when the unit integrated Can not represent real user interaction
INTEGRATION TEST To verify that several units work together in
harmony. Tools: • TestingLibrary.com
Verify most of user interactions Slower feedback than UT More
effort than UT INTEGRATION TEST: PRO & CONS Can not represent device variant Can not replicate using the real data
END-TO-END TEST A robot that behaves like a user to
click around the app and verify that it functions correctly. Tools: • Cypress • Nightwatch • TestCafe
Can use multiple device Very slow to executed Need the
biggest effort E2E TEST: PRO & CONS Can use real data Replicate real user
COMPARISON Static Test Unit Test Integration E2E Test 🚀 Speed
🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 ⏰ Development time 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 💰 Cost 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 😎 Confidence 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 🟢 Read more on https://kentcdodds.com/blog/static-vs-unit-vs-integration-vs-e2e-tests
BEST ROI https://twitter.com/kentcdodds/status/960723172591992832
DEMO TIME!
CHECK THE CODE https://github.com/mazipan/react-testing-workshop Prerequisites: • Node.js
ASK ME!
CREDITS: This presentation template was created by Slidesgo, including icons
by Flaticon, and infographics & images by Freepik and illustrations by Stories. THANK YOU Please keep this slide for attribution.